Paper pulp beating machine



Jan. 5, 1932. as. FRITZ PAPER PULP HEATING MACHINE Filed July 20, 1928 2 Sheets-Sheet l Jan. 5, 1932. E. B. FRITZ PAPER PULP BEATING MACHINE Filed July 20, 1928 2 Sheets-Sheet 2 Patented Jan. 5, 1932 STATES ED ARD J3. FRITZ, or CHICAGO, .iLLINoIs PAPER rm BEATING' MACHINE Application filed July, 20,

My invention is an improvement in pulp beating machines. i

The commonly known typerof beater used in the manufacture of paper out of various ingredients is an elongated vat partly dis. vided by a partition: Onone sideof the said partition, between the said partition and a wall of the vat, a wheel or drum operating in the channel between the partition and the wall is arranged to operate upon the material being passed through the said channel. In the ordinary process of beating the material with this cylinder or drum there isa comparatively small area of contact where the cylinder mechanism operates to beat the mate.- rial passing through: After leaving this contact point, which is ordinarily placed in the floor of the channel, the material which has been operated upon isforced or lifted to. a point somewhat adjacent tothe top edge of the wall of the channel, at which point the material passes over the edge of what might be called a baclrfall, and down the other side thereof on an incline to again go in acourse around the vat to repeat the operation. The process is one involving much time and large expenditure of power to accomplish the result, and the material is repeatedly operated upon until the mass is finished and removed for a new'batch. The object of my invention is a device which can be installed in connection with the beater types now used, and many times multiply the efficiency of said machine, shortening the length of time for perfecting the work upon pulp material, screen the material finished at each stage and induce a practically continuous system of beating.

I show an embodiment of my device in the accompanying drawings in which Fig. 1 is an elevation of an ordinary type of beater, with my device as part thereof. Fig. 2 is a longitudinal sectional division ofsucha beater, taken with a side wall removed. Fig; 3 is a backfall portion of my'device. Fig. 4 is an enlarged view of a heater roll.

As illustrated 5 is a heater, and 6 is a common type of cylinder, ordinarily used in the heaters described, and consists of. a revolving cylinder having on its periphery a 1928. Serial No. 294,184.

spaced series of blades, corrugations or ribs, which said surface members are adapted to be broughtinto contact with an abrading sur-' face 7assemble'd in the floor of the beater;

By reason'of the location of the abrading material in the floor of the vat and the contour of the cylinder 6theeflicient-activity of the process of reducing the material passing therethrough is very limited. A wall. 7a is ordinarily placed in the said described beat.-- 86: ers along which the material is carried during therevolutions of thecylinder 6, after. the material haspassed the abrading surface 7 .7 The top of this wall isprojected tobe above the level of the material approaching the cyl- 61E inder 9 on the opposite side thereof; Ordinarily over'the edge of this wall there is a drop to the floor of the vat, which said floor at that point is slightly higher than the floor on the other side of the cylinder 6, said floor 10 inclining gradually around the vat so as to assistthe material in moving back to the. point of beginning. There is abaflie 8 assems bled at an elevation adjacent the peripheral edge of the protrusions upon the cylinder 6 I5 adapted to preventa passage of thepulp material on the. return with the cylinder 6. At the point where the material turns over the backfall 7 a1 place a circular portion 11 covering at least a quarter of a circle, its outer end resting upon the floor of the vat: In this circular portion I provide spaced metal pro.- jections 12,:and between the said spaced projections 12 I assemble a series of strips 13, I preferably of wood, but whatever the mate- S5 rial it is of a different character and density to-the metalprojections 12. These fillers 13 aremade removable so that as they are "wor new members may be inserted.

I provide a cylinder 9 substantially 'longitudinally parallel to the cylinder 6 but of much smaller diameter, having on its periphery projections 10 adapted to serve a similar purpose to the described projections on cylinder 6, and perform the same active relation to the members 12' and 13 as is performed by the cylinder 6 against the member 7; but by reason of the circular form thereof I accomplish primarily a manifold efiiciency. The said cylinder 9 being operable at a higher 1 provide a backfall 15 which consists of a sub-,

stantially inverted V shaped formwhose topmost elevation is intended to be at a point for properly restraining any return flow of the material operated on by the cylinder 9. This backfall 15 I perforate on both sides with holes 16 for the purpose of permitting the material operated upon to pass such portions through as have been reduced to the desired stage for further paper production, the ma terial being screened or sifted on both sides of this member 15 as it comes from its treatmerit under the cylinder 9. An outlet 21 from the side of the vat 5 takes the material as it is screened through the baekfall 15. It will be seen that the material, in a finished stage for further paper making, is separated in the course of its treatment; and only such por tions continue around the channels of the beater as are not fullyreduced to the stage desired.

l In the ordinary processes of the beater machines described, a batch of material delivered in the heater 5 passes around and around until all the material is assumed to be of equal consistency for the purposes desired and this involves a repeated handling of portions of the material which are more or less perfect at each turn around the beater: It will be seen that the process herein described is continuous in that the material which has been operated upon is screened as it comes from the auxiliary beater and automatically passes out of the heater for further work, and its place is filled by constant delivery into the vat of an equal amount of less finished ma.- terial. 7

On the backfall 15 I provide a series of lugs 18, sliding in which I provide plates 17 having a contour similar to the surfaces of the backfall 15and having perforations registering with the perforations 18 in the body of the backfall 15. These plates 17 are movable within a short range by adjusting screws 20 which are adapted to movethese plates 17 in relation to the surface of 15 so that the screening of the material as it comes from the cylinder 9 may be adjusted to such a degree of refinement as may be desired.

22 is a type of ordinary means for raising and lowering the bearings of the cylinder 6: 23 is a means I provide for adjusting the relation of the cylinder 9 to the abrading surfaces 13.

I claim:

1. In a pulp beating machine comprising a vat and a dividing wall therein producing a continuouschannel around said dividing wall, a portion of said channel raised forming an incline plane over a portion of said channel; an abrading means in the floor of said channel at a point where it contacts with a primary cylinder assembled and revolving between the said dividing wall and the outer wall of the said vat, said cylinder adapted to act upon material in said vat in conjunction with the abrading surface in the floor of said vat; means to liftthe abraded material over a backfall to a point of delivery higher than the point of abrading activity of the primary cylinder: a secondary cylinder adjacent the said primarycylinder arranged to revolve in contact relation to a semi-circular series of abrading surfaces and operate upon the material delivered from the primary cylinder; a backfall means connected with the abrading surfaces whereon to deliver the material operated upon by said cylinder and said semicircular abrading surface, said backfall being in substantially reverse V form-one side of the V form following the contour of the abrading surfaces to a point substantially equal to the elevation of the primary backfall, the said secondary backfall being perforated on both inclines thereof whereby the material which has been operated upon is sifted as it passes thereover; the sifted por tion being automatically transported away from the vat and the unfinished portion being permittedto repeat its course around the beat or channel to be again treated to refining.

2. Ina device for the purposes described an auxiliary cylinder revolvably mounted adjacent the primary cylinder of a beating machine, said auxiliary cylinder being smaller and adapted to operate at a higher speed than the primary cylinder, and adapted to operate upon material after its delivery from the first cylinder operation;

said auxiliary cylinder traveling in a substantially semicircular area comprising an abrading surface and a sifting surface, the abrading surface forming approximately a 45 degree portion of the semicircular area. and presenting an extensive abrading surface to the action of the auxiliary cylinder; a screening means forming part of the travel circuit of the auxiliary cylinder whereby the material acted upon is sifted and separated during the progress of the material through the beater, said sifting means adapted to sift and screen the material on its upward travel after leaving the cylinder and on its downward travel in the course of its transit, and means to deliver the sifted material away from the heater.

3. In a device for the purposes described a primary beater, a secondary beater having move the sifted, refined material; adjustable a multiplied abrading surface in a semi-cirmeans for varying the degree of the slfted', cular area of approximately 45 degrees; a refined material.

screening and sifting means assembled adjacent the point of delivery of the material from the secondary treatment; means to adjust the size of the apertures in the screening device whereby to secure various degrees of refinement in the material delivered.

4. In a beating machine of the class described a plurality of beating members in progressive order, the member subsequent to the primary beating member being devised to increase the abrading character of the mechanism, taking the material as delivered to it and refining the same in intensified stages during its travel through the beating machine; means for separating and sifting the material at predetermined stages of its travel; and means for delivery away from the beating machine of the material operated upon, at a stage of its travel, leaving the material unfinished to proceed on its course back to the beating mechanism.

5. In a beating machine comprising a receptacle having a dividing portion therein forming a continuous channel in said receptacle; a plurality of beating members spaced apart in the channel of said receptacle and so arranged that the material operated upon by the first of the beating members is automatically delivered to a. subsequent beater, means whereby the subsequent beating member operates to induce a suction relief against back pressure of the material operated upon by the primary member, means whereby the secondary beating member is adapted to automatically utilize the gravity of the delivered material to economize power, means to sift the material operated upon and automatically deliver apart from the receptacle the finished material as the mass travels around the channel.

6. In a beating machine comprising a receptacle having a dividing portion therein forming a continuous channel in said receptacle; a plurality of beating devices spaced apart in the channel of said receptacle and so arranged that the material operated upon by one of the beaters is automatically delivered to a subsequent beater, means to sift the material operated upon and automatically deliver apart from the receptacle the finished material as the mass travels around the channel; means to adjustably vary the refining degree of the sifting means during the travel of the material operated upon through the machine.

7. In a beating machine a means sequel to the primary beater comprising means to perform a secondary abrading operation upon the material delivered from the primary beater; and means adjacent thereto to sift the material as it is delivered from the secondary means, means to automatically re- Signed at Chicago, 111., July 7, 1928. EDWARD B. FRITZ. 

